Form for a different model than the view page in ASP.NET MVC 3

I have Results page that contains an signup form. I'm trying to use client-side validation on the email model, but I can't because the model type is different than the type I'm posting.

class Results
{
     ... // some results data to display
}

class EmailSignup
{
    public virtual int Id { get; set; }

    [Required(ErrorMessage = "Please enter your email.")]
    [DataType(DataType.EmailAddress)]
    [RegularExpression(@"^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$", ErrorMessage = "Please enter a valid email address.")]
    public virtual string Email { get; set; }
}

Results.cshtml

@model MyApp.Results
[display results]
...
@using (Html.BeginForm("SubmitEmail", "AnalysisResults", FormMethod.Post))
{
     <fieldset>
     @Html.TextBoxFor( model => model.???? )
     </fieldset>
}

The type I want the user to submit is EmailSignup, not Results.